Skin is a multi-layered "organ" that makes up the covering ... skin, which is the outer most skin layer. We slough off some cells as well as bacteria and fungi that are ... out on our skin. If we scratch hard enough or scrape of against something we can get an abrasion or ...

i did it a year ago. here's the protocol 1. vigorously scrape the inside of the cheek with a toothpick 2. place the toothpick in a clean ... for 3 minutes. 13. bottom = chelex and extraneous cellular matter, top layer = DNA. Sample = ready for PCR or may be stored at 4 C or frozen at -20 ...